Add the "virtual" instance for face HAL retroactively am: f426201991 am: 331cdf4127 am: a8e7d2aad5 am: 2cb03009ca

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2751164

Change-Id: Ifd3edec4c20f140c90be85956b2bb137cc76c9f6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>